GDS-806/810/820/840 Programming Manual 
 
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*SRE 
Setup the contents of the Service Request Enable Register (SRER). The query 
form returns the contents of the SRER. Bit 6 of the SRER is always zero. The bits 
on the SRER correspond to the bits on the SBR.   
Syntax 
*SRE <NR1> 
*SRE? 
Arguments 
<NR1> is an integer from 0 to 255. 
Returns 
<NR1> 
Examples 
*SRE 7 sets bits of the SRER to 0000 0111. 
If the *SRE? returns 0000 0011, the setting of *SRE is 3. 
*STB? (query only) 
Query of the Status Byte register (SBR) with *STB? will return a decimal number 
representing the bits that are set (true) in the status register. 
Syntax 
*STB? 
Returns 
<NR1> 
Examples 
*STB? returns 81 if SBR contains the binary value 0101 0001.